Add regression test for remap-path-prefix handling in rustdoc for deps

Author: Urgau

tests/run-make/rustdoc-remapped-paths/dep.rs

@@ -0,0 +1,9 @@
+pub struct MyStruct {
+    field: u32,
+}
+
+impl MyStruct {
+    pub fn new() -> MyStruct {
+        MyStruct { field: 3 }
+    }
+}

tests/run-make/rustdoc-remapped-paths/reexport.rs

@@ -0,0 +1,3 @@
+extern crate dep;
+
+pub use dep::MyStruct;

tests/run-make/rustdoc-remapped-paths/rmake.rs

@@ -0,0 +1,24 @@
+use run_make_support::{cwd, rfs, rustc, rustdoc};
+
+fn main() {
+    // 1. Let's compile the `dep` crate with some `--remap-path-prefix`
+    rustc()
+        .input("dep.rs")
+        .crate_type("lib")
+        .arg(format!("--remap-path-prefix={}=", cwd().display()))
+        .run();
+
+    // 2. Let's generate the documentation for the `dep` crate
+    //    in order to have it's sources generated
+    rustdoc().input("dep.rs").crate_type("lib").run();
+
+    // 3. Let's generate the documentation for the `reexport` crate
+    //    with `dep` as dependency
+    rustdoc().input("reexport.rs").crate_type("lib").extern_("dep", "libdep.rlib").run();
+
+    // Let's verify that "Source" links for dep exist in `MyStruct` page
+    let reexport_MyStruct_content = rfs::read_to_string("doc/reexport/struct.MyStruct.html");
+    // FIXME: Those assert don't work!
+    assert!(reexport_MyStruct_content.contains(r#""../src/dep/dep.rs.html#1">Source"#));
+    assert!(reexport_MyStruct_content.contains(r#""../src/dep/dep.rs.html#6">Source"#));
+}